chore: two fixit fixes

[leahecole]

fixes b/376678489 and b/372030525

[chalmerlowe]

The python library typing_extensions dropped support for Python 3.7 in a PR issued 9 months ago (v4.8). We have a corresponding PR hardcoding into our requirements.txt to use v4.7.1 if we need to install Python 3.7.

Having said that, it appears as though the install may not be respecting our wishes as defined in the requirements.txt file.

The line of code that gives an error in the logs includes a keyword argument (closed) that was NOT introduced to the typing_extensions library until v4.9.

File "/workspace/samples/desktopapp/.nox/py-3-7/lib/python3.7/site-packages/pip/_vendor/typing_extensions.py", line 1039
    def TypedDict(typename, fields=_marker, /, *, total=True, closed=False, **kwargs):

Add support for PEP 7xx. (support added in version 4.9, Feb 8, 2024)

python/typing_extensions@b7bf949

Drop support for Python 3.7 (support dropped in 4.8, Jul 6, 2023)

python/typing_extensions@8860c6a

[leahecole]

Tony let me know that the owlbot PR I just merged should fix this, so I'll merge main in and see if it's true!

[chalmerlowe]

LGTM